In the midst of a critical struggle over the royal succession, King David summons Bathsheba to deliver his final decision. The sudden need to call for her highlights the careful and calculated dynamics at play within the royal court during these tense moments. The request to bring her in indicates that she was no longer by his side. When Nathan the prophet had entered the king's chamber, Bathsheba either stepped out entirely [מלבי״ם, ביאור שטיינזלץ] or quietly moved aside while the prophet spoke [רד״ק].
This distance was not accidental. The primary approach among commentators is that she deliberately removed herself so that neither the king nor anyone else would suspect that she and Nathan had secretly coordinated their plea [מצודת דוד, רלב״ג, צאינה וראינה]. Furthermore, David himself was initially hesitant to discuss the succession directly with Bathsheba, knowing she was far more personally and emotionally invested in the outcome than the prophet [רלב״ג].
Now that his mind is made up, David calls her back. Because she had left earlier without receiving a clear response, he wishes to inform her that he will fulfill his oath that very day [מלבי״ם]. Since this royal decree directly impacts her life and future, the king insists on delivering the news to her personally [מצודת דוד].
Alongside this straightforward reading, a completely different approach suggests that summoning Bathsheba served to prove the king's physical vitality. At the time, rumors and mockery circulated among the people, claiming that David's lack of intimacy with his young caretaker, Abishag, was simply due to old age and weakness. The public compared him to a thief who only boasts of honesty when he has nothing left to steal. To silence these rumors and prove that he avoided Abishag solely because God had forbidden her to Him—as David already possessed the maximum eighteen wives allowed for a king—he called Bathsheba to his room to be intimate with her. This act was meant to demonstrate to everyone that the king remained physically capable and strong [רד״ק, צאינה וראינה].